Altar of Evil

Altar of Evil is a single-level PWAD for Doom II using the ZDoom source port. It was designed by Ronald Lubbelinkhof (Dutch Devil) and uses the music track "Suspense," originally composed by Robert Prince for Doom.

Altar of Evil was acknowledged as a runner-up during the 2005 Cacowards ceremony.

Monsters
The level includes eight new enemies, which are defined in a DECORATE lump with new thing types and do not replace vanilla monsters. Sprites for existing monsters like the demon, Hell knight, baron of Hell and mancubus have also been modified.
 * Shadow wraith:A variant of the imp (type 3123)
 * Slime imp:Another imp variant (type 3124)
 * Flamedemon:A dark grey demon (type 3128)
 * Nightmare spectre:A blue variant of the spectre (type 3127)
 * Cacolord:A stronger cacodemon (type 3125)
 * Ashwraith:A dark grey baron of Hell (type 3126)
 * Lost spirit:A lost soul variant (type 3130)
 * Spiritmaster:A variant of the pain elemental (type 3129)

Other points of interest
In secret #3, there is a hidden switch tucked in the eastern part of the southern wall. Pressing it will open up the door across the secret room. Behind that door is an optional area with lots of enemies and invulnerability.

Secrets

 * 1) Head to the area north of the starting point and press on the recessed wall on the east side to find a medikit, a chaingun, and a box of ammo. (sector 705)
 * 2) Flip the switch east of the super shotgun to open the south door. In the next room, press on the recessed wall on the west side to get a backpack. (sector 629)
 * 3) After taking the teleporter in the room with cages (the one east from the red door), go east, north, then use the wall to the west. The room you will find contains a box of ammo, a box of shotgun shells, and a medikit. (sector 409)
 * 4) In the area with the shotgun and the lights shining in the outer walls (southeast of the blue door), go to the east side and press on a recessed wall to find a stimpack and a teleporter. The teleporter will take you to a cage near the start with shotgun shells, a box of ammo, and a megaarmor. (sector 47)
 * 5) After you get the blue key, go to the room north of where it was and there will be a teleporter to the west. Approach the teleporter, but before entering it, use the south wall with a pool of blood. Follow the passage that has ammo clips to reach a caged area with more ammo and a megasphere. (sector 2247)
 * 6) Open the blue door at the north end and use the wall to the left of the door (west) to find a teleporter. Use it to teleport to a caged area with energy cells and a plasma gun inside of it. (sector 58)
 * 7) In the southernmost part of the map, drop into the lava and enter the east cave. Use the southeast wall to find a medikit, partial invisibility, shotgun shells (only on Ultra-Violence or higher), and a computer area map. (sector 3307)

Current records
The records for the map at the Doom Speed Demo Archive are:

The (absence of) data was last verified in its entirety on December 6, 2021.

Things
This level contains the following numbers of things per skill level: